Momentum and Impulse Concepts

The video tutorial explains the impulse-momentum relationship, emphasizing that only external impulses change an object's momentum. It uses examples like a cannon firing and pool ball collisions to illustrate momentum conservation. The tutorial also differentiates between elastic and inelastic collisions, highlighting that momentum is conserved in both types. Finally, it presents a problem involving a freight train to reinforce the concept of momentum conservation.

What happens to a stationary grocery cart when an impulse is exerted on it?

• It remains stationary.

• It loses mass.

• It gains momentum.

• It changes direction.

What is required to change the momentum of an object?

• A change in velocity.

• An internal impulse.

• An external impulse.

• A change in mass.

What happens to the net momentum of a system when internal impulses are exerted?

• It increases.

• It decreases.

• It remains unchanged.

• It becomes negative.

In the absence of an external impulse, what happens to the momentum of a system?

• It increases.

• It decreases.

• It remains unchanged.

• It becomes zero.

What is the net momentum of a cannon and cannonball system before and after firing?

• Non-zero before and non-zero after.

• Zero before and zero after.

• Non-zero before and zero after.

• Zero before and non-zero after.

What type of collision occurs when colliding objects rebound without lasting deformation or heat generation?

• Elastic collision.

• Partial collision.

• Perfectly inelastic collision.

• Inelastic collision.

In which type of collision do colliding objects become distorted and possibly stick together?

• Perfectly elastic collision.

• Inelastic collision.

• Elastic collision.

• Partial collision.

What is conserved in all collisions as long as no external forces act during the collision?

• Energy.

• Mass.

• Velocity.

• Momentum.

What happens to the momentum of a Q ball when it collides head-on with a stationary eight ball?

• It increases.

• It decreases.

• It transfers to the eight ball.

• It remains unchanged.

If a freight train car moving at 10 m/s collides with an identical car at rest and they couple together, how fast do they move?

• 20 m/s.

• 5 m/s.

• 10 m/s.

• 15 m/s.